Performance Enhancement of Gold Coated D-shaped PCF Sensor Using Monolayer MoS2

In this paper, we present a surface plasmon resonance (SPR) based photonic crystal fiber (PCF) sensor for diagnosing deadly malaria. The proposed structure adapts an external sensing scheme that enables the malaria parasite-infected blood sample to be detected easily. We have incorporated dual microchannel in our model to obtain high sensitivity by orienting the plasmonic layer closer to the core region. The flat surface of the microchannel is coated with a silver plasmonic metal and an overlayer of 2D material is coated onto the plasmonic layer. We compare the sensitivity obtained from the 2D MoS2 and graphene layer coating onto the silver layer. We find that MoS2 provides better sensitivity than the uncoated or graphene-coated models. Further, the number of layers of MoS2 has been optimized to be 5 layers of thickness 3.25 nm. After the set of parameters optimization, the proposed sensor exhibits the maximum sensitivities of 7758 nm/RIU, 9210 nm/RIU, and 12,428 nm/RIU, with the maximum spectral resolution of 1.29× 10− 5, 1.09× 10− 5, 8.04× 10− 6 RIU for the schizont, trophozoite, and ring phases, respectively. Besides, we also compute the amplitude sensitivities and they are 354.57, 387.71, and 339.34 RIU− 1 with the maximum amplitude resolution of 8.2× 10− 6,4.9× 10− 6, and 2.06× 10− 6 for the schizont, trophozoite, and ring phases, respectively. Further, we also investigate the other important characteristics of the proposed sensor such as signal-to-noise ratio (SNR), full-width half maximum (FWHM) of the peak, and figure of merit (FOM). In addition to the high sensitivity, the proposed structure also exhibits ultra-low loss for detection. Hence, it can be driven using a low-power source through which the experimental implementation is simplified. Thus, the numerical results corroborate that the proposed sensor is better than existing ones in terms of good sensing performance, cost-effective fabrication, and ultra-low power consumption.

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Microfluidics and Nanofluidics in Strong Light–Matter Coupling Systems

Granizo,

Kriukova,

Escudero-Villa

et al. 2024

Nanomaterials

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The combination of micro- or nanofluidics and strong light–matter coupling has gained much interest in the past decade, which has led to the development of advanced systems and devices with numerous potential applications in different fields, such as chemistry, biosensing, and material science. Strong light–matter coupling is achieved by placing a dipole (e.g., an atom or a molecule) into a confined electromagnetic field, with molecular transitions being in resonance with the field and the coupling strength exceeding the average dissipation rate. Despite intense research and encouraging results in this field, some challenges still need to be overcome, related to the fabrication of nano- and microscale optical cavities, stability, scaling up and production, sensitivity, signal-to-noise ratio, and real-time control and monitoring. The goal of this paper is to summarize recent developments in micro- and nanofluidic systems employing strong light–matter coupling. An overview of various methods and techniques used to achieve strong light–matter coupling in micro- or nanofluidic systems is presented, preceded by a brief outline of the fundamentals of strong light–matter coupling and optofluidics operating in the strong coupling regime. The potential applications of these integrated systems in sensing, optofluidics, and quantum technologies are explored. The challenges and prospects in this rapidly developing field are discussed.

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Performance Enhancement of Gold Coated D-shaped PCF Sensor Using Monolayer MoS2

Cited by 3 publications

References 45 publications

Ultra Low Loss Dual Square Groove Incorporated SPR-Based PCF Sensor for Malaria Diagnosis

Ultra Low Loss Dual Square Groove Incorporated SPR-Based PCF Sensor for Malaria Diagnosis

Ultra Low Loss Dual Microchannel Incorporated SPR Based PCF Sensor for Malaria Diagnosis

Microfluidics and Nanofluidics in Strong Light–Matter Coupling Systems

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